Reactive Spark Plasma Sintering and Thermoelectric Properties of Zintl Semiconducting Ca14Si19 Compound

被引：4

作者：

Ali, Doaa Omar A. ^{[1
,2
]}

Fabbiani, Marco ^{[2
]}

Coulomb, Loic ^{[2
]}

Bosc, Simon ^{[2
]}

Villeroy, Benjamin ^{[3
]}

Estournes, Camille ^{[4
]}

Estournes, Claude ^{[4
]}

Koza, Michael Marek ^{[1
]}

Beaudhuin, Mickael ^{[2
]}

Viennois, Romain ^{[2
]}

机构：

[1] Inst Laue Langevin ILL, F-38042 Grenoble, France

[2] Univ Montpellier, ICGM, CNRS, ENSCM, Montpellier, France

[3] Univ Paris Est Creteil, ICMPE, CNRS, F-94320 Thiais, France

[4] Univ Paul Sabatier, Univ Toulouse, CIRIMAT, CNRS, 118 Route Narbonne, F-31062 Toulouse 9, France

来源：

CRYSTALS | 2023年 / 13卷 / 02期

关键词：

reactive SPS; thermoelectricity; silicides; CA-SI; PHASE-TRANSITIONS; PRESSURE; CASI2;

D O I：

10.3390/cryst13020262

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We present a new reactive spark plasma sintering (RSPS) technique for synthesizing the rhombohedral Ca14Si19 phase. The RSPS approach reduces the synthesis time from several weeks to a few minutes. The RSPS was found to be sufficient for obtaining a high level of purity of the Ca14Si19 under a pressure of 100 MPa for a dwell period of 5 min at a temperature of 900 C-?. From electrical resistivity measurements, we were able to determine the energy band gap of Ca14Si19 to E-g = 0.145(15) eV. The Seebeck coefficient shows Ca14Si19 as a p-type semiconductor at room temperature. It becomes n-type with increasing temperature pointing to significant bipolar and conduction band contributions due to the narrow bandgap of the compound.

引用

页数：12

共 66 条

[1] In-situ reactive synthesis of dense nanostructured β-FeSi2 by Spark Plasma Sintering [J].

Abbassi, Linda ;

Mesguich, David ;

Coulomb, Loic ;

Chevallier, Geoffroy ;

Aries, Romain ;

Estournes, Claude ;

Flahaut, Emmanuel ;

Viennois, Romain ;

Beaudhuin, Mickael .

JOURNAL OF ALLOYS AND COMPOUNDS, 2022, 902

[2] Low temperature properties of calcium mono- and disilicides [J].

Affronte, M ;

Laborde, O ;

Olcese, GL ;

Palenzona, A .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 274 (1-2) :68-73

[3]

Ali D.O.A., 2022, INELASTIC NEUTRON SC

[4]

Bandhari C.M., 1995, OPTIMIZATION CARRIER

[5] Thermoelectrics: From history, a window to the future [J].

Beretta, Davide ;

Neophytou, Neophytos ;

Hodges, James M. ;

Kanatzidis, Mercouri G. ;

Narducci, Dario ;

Martin-Gonzalez, Marisol ;

Beekman, Matt ;

Balke, Benjamin ;

Cerretti, Giacomo ;

Tremel, Wolfgang ;

Zevalkink, Alexandra ;

Hofmann, Anna, I ;

Muller, Christian ;

Dorling, Bernhard ;

Campoy-Quiles, Mariano ;

Caironi, Mario .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2019, 138 :210-255

[6]

Blundell SJ., 2010, Concepts in Thermal Physics, V2

[7] Structural phase transitions in CaSi2 under high pressure [J].

Bordet, P ;

Affronte, M ;

Sanfilippo, S ;

Núñez-Regueiro, M ;

Laborde, O ;

Olcese, GL ;

Palenzona, A ;

Le Floch, S ;

Levy, D ;

Hanfland, M .

PHYSICAL REVIEW B, 2000, 62 (17) :11392-11397

[8]

Borisenko V.E., 2000, Semiconducting Silicides

[9] Thermodynamic stabilities of intermediate phases in the Ca-Si system [J].

Brutti, S ;

Ciccioli, A ;

Balducci, G ;

Gigli, G ;

Manfrinetti, P ;

Napoletano, M .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 317 :525-531

[10]

Buchal Christoph, 2020, EPJ Web of Conferences, V246, DOI 10.1051/epjconf/202024600003

← 1 2 3 4 5 6 7 →